Chalk holder



FIG. 1 is a front view of a chalk holder showing our design;

FIG. 2 is a rear view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The even length broken lines depict unclaimed portions of the chalk holder. 

CLAIM The ornamental design for a chalk holder, as shown and described. 